管理手机返回键功能的系统，在跳转页面的时候注册返回事件为关关闭自身，自身关闭或回调生效时注销事件，还包括左右滑动事件

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class GetMobileKeyManager : MonoBehaviour
{
    private float clickTime;
    
    public static GetMobileKeyManager Main;

    private Vector2 clockPos;

    private void Awake()
    {
        Main = this;
        DontDestroyOnLoad(gameObject);
        LeftSlide = () => {};
        RightSlide = () => {};
    }

    public Action LeftSlide,RightSlide;

    public bool leftSliderActive = true, rightSliderActive = true;

    private Dictionary<string, Action> BackKeyDownEvents = new Dictionary<string, Action>();

    private List<string> EventsName = new List<string>();


    public void AddBackKeyEvent(string eventName,Action Event)
    {
        if(EventsName.Contains(eventName)){return;}
        EventsName.Add(eventName);
        BackKeyDownEvents.Add(eventName,Event);
    }

    public void RemoveBackKeyEvent(string eventName)
    {
        if(!EventsName.Contains(eventName)){return;}
        BackKeyDownEvents.Remove(eventName);
        EventsName.Remove(eventName);
    }

    
    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Escape))
        {
            if(EventsName.Count==0){return;}
            Debug.Log(EventsName[EventsName.Count - 1]);
            BackKeyDownEvents[EventsName[EventsName.Count - 1]]();
//            RemoveBackKeyEvent(EventsName[EventsName.Count - 1]);
        }

        if (GameManager.Main.GetClick())
        {
            clockPos = GameManager.Main.GetPos();
            clickTime = Time.time;
        }
        
        if (GameManager.Main.GetClickUp())
        {
            if (Time.time - clickTime < 1 && GameManager.Main.GetPos().y < 600 && clockPos.y < 600)
            {
                if (GameManager.Main.GetPos().x > clockPos.x+100)
                {
                    if(leftSliderActive){LeftSlide();}
                }
                else if (GameManager.Main.GetPos().x < clockPos.x-100)
                {
                    if(rightSliderActive){RightSlide();}
                }
            }
        }
    }
}